JPH11194079A - Characteristic test device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a characteristic test device which always and precisely measures a load in a vertical direction. SOLUTION: A test object A is held between an upper board 2 and a lower board 3 and a vertical-moving mechanism 4 moves the upper board 2 downward. Thus, a compression load is added to the test object A and a vertical load detector 6 detects the load in the vertical direction on the test object A. At that time, the load on the test object A is directly measured by the vertical direction load sensor 6 and therefore the influence of the dead weight of the upper board 2 and the sliding resistance of the vertical direction moving mechanism 4 is not given at the time of measurement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a characteristic test apparatus for testing characteristics of rubber materials used for, for example, a bridge girder support or a building seismic isolation device.

[0002]

2. Description of the Related Art In general, rubber materials used for supporting bridge girders and seismic isolation of buildings are formed by alternately laminating a large number of steel plates and rubber plates. When testing the characteristics of this rubber material, measure the displacement of the rubber material due to the vertical load and the displacement of the rubber material due to the horizontal load using a characteristic test device that applies vertical and horizontal loads to the test object. doing. Further, as the characteristic test device, an upper plate holding the upper surface of the test object, a lower plate holding the lower surface of the test object, a vertical movement mechanism for moving the upper plate in the vertical direction, a lower plate And a horizontal direction moving mechanism for moving the horizontal direction.

[0003]

However, in the conventional characteristic test apparatus, when measuring the load in the vertical direction, the load is calculated by multiplying the internal pressure of the cylinder of the vertical movement mechanism by the cross-sectional area of the cylinder. In addition, since the weight of the top plate is adjusted as a correction value, the calculation of the load becomes complicated, and there is a problem that a measurement error easily occurs.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a characteristic test apparatus capable of always accurately measuring a vertical load.

[0005]

According to the present invention, in order to achieve the above object, an upper plate for holding an upper surface of a test object and a lower plate for holding a lower surface of the test object are provided. A vertical movement mechanism for vertically moving the upper plate, and a vertical load detector for detecting the vertical load of the test object, the upper plate and the vertical movement mechanism comprising a vertical load detector. It is provided so as to be supported by the apparatus main body through the main body. As a result, the load applied to the test object is directly detected by the vertical load detector,
It is not affected by the weight of the top plate during measurement.

According to a second aspect of the present invention, there is provided the characteristic test apparatus according to the first aspect, further comprising a vertical displacement detector for detecting a vertical displacement of the test object, wherein the detector of the vertical displacement detector is provided. It is arranged so as to contact the top plate. Thus, in addition to the operation of claim 1, since the displacement of the test object is measured by the vertical displacement measuring device in contact with the upper surface plate, the displacement amount due to the deformation of the members of the vertical moving mechanism and the vertical load detector. No measurement error occurs.

According to a third aspect of the present invention, in the characteristic test apparatus according to the first or second aspect, the upper surface plate is urged upward between the upper surface plate and the vertical movement mechanism to move the upper surface plate toward the vertical movement mechanism. An urging mechanism for swinging pressure contact is provided. Accordingly, in addition to the function of claim 1 or 2, since the upper surface plate is pressed against the vertical movement mechanism side by the biasing mechanism, only the own weight of the upper surface plate is not applied to the test object at the time of pressurization. .

[0008]

1 to 5 show one embodiment of the present invention. FIG. 1 is a front view of a characteristic test apparatus, FIGS. 2 and 3 are enlarged side views of essential parts thereof, and FIG. FIG. 5 is an explanatory diagram of the operation.

This characteristic test apparatus includes a frame 1 constituting a main body of the apparatus, an upper plate 2 for holding an upper surface of a test object A such as a rubber material, and a lower plate 3 for holding a lower surface of the test object A. A vertical moving mechanism 4 for moving the upper plate 2 in the vertical direction, a horizontal moving mechanism 5 for moving the lower plate 3 in the horizontal direction, and a vertical load detector for detecting the vertical load of the test object A. Device 6, a horizontal load detector 7 for detecting the horizontal load of the test object A, a vertical displacement measuring device 8 for measuring the vertical displacement of the test object A, And a horizontal displacement measuring device 9 for measuring the displacement in the direction.

The frame 1 is composed of a plurality of columns 1a and a support member 1b laid over the columns 1a, and a substrate 1c is provided below the columns 1a.

The upper surface plate 2 has a convex spherical plate 2a and a concave spherical plate 2b which are slidably fitted to each other on the upper surface side. The convex spherical plate 2a and the concave spherical plate 2b are mutually connected by a plurality of biasing mechanisms 10. We are in pressure contact. As shown in FIG. 2, each urging mechanism 10 pushes a rod 10c of a piston 10b that slides in a cylinder 10a through an edge of the concave spherical plate 2b.
The convex spherical plate 2a is fixed to the edge of the cylindrical surface 10a, and the convex spherical plate 2a is pressed against the concave spherical plate 2b by urging the convex spherical plate 2a upward by air pressure in the cylinder 10a. Further, each urging mechanism 10 discharges the air in the cylinder 10a to release the urging upward of the convex spherical plate 2a, so that the piston 10b moves the cylinder 10a by its own weight of the upper surface plate 2 as shown in FIG. Abut on one end. Note that the urging mechanism 10 can have the same function by using an air spring.

The lower plate 3 is set on a substrate 1c and is supported movably in the horizontal direction by rails 3a.

The vertical moving mechanism 4 is composed of a hydraulic cylinder, and a rod 4a extending downward is provided with a concave spherical plate 2b of the upper surface plate 2.
The upper plate 2 is moved up and down by sliding the rod 4a.

The horizontal movement mechanism 5 is composed of a hydraulic cylinder, and connects a laterally extending rod 5a to the lower plate 3, and moves the lower plate 3 in the horizontal direction by sliding the rod 5a.

The vertical load detector 6 comprises a plurality of compression / tensile load cells. The upper end is connected to the supporting member 1b of the frame 1, and the lower end is connected to the hydraulic cylinder of the vertical moving mechanism 4. That is, the upper plate 2 and the vertical movement mechanism 4 are supported by the frame 1 via the vertical load detector 6.

The horizontal load detector 7 comprises a single compression / tensile load cell, one end of which is connected to the lower plate 3 and the other end of which is connected to the hydraulic cylinder of the horizontal moving mechanism 5.

The vertical displacement measuring device 8 is composed of a plurality of stroke sensors contacting the upper surface plate 2, and its detectors are arranged in contact with the upper surface plate 2, respectively. The displacement is measured.

The horizontal displacement measuring device 9 is composed of a stroke sensor which comes into contact with the lower plate 3, and its detector is arranged in contact with the lower plate 3 to measure the horizontal displacement of the lower plate 3. I have.

In the characteristic test apparatus configured as described above, the test object A is held between the upper plate 2 and the lower plate 3, and the upper plate 2 is moved downward by the vertical movement mechanism 4, A compressive load is applied to the test object A.
At this time, the vertical load of the test object A is detected by the vertical load detector 6, and the vertical displacement is measured by the vertical displacement measuring device 8. That is, test object A
Is directly detected by the vertical load detector 6, so that the measurement is not affected by the weight of the upper surface plate 2 or the sliding resistance of the vertical moving mechanism 4. At this time, the upper surface plate 2 is moved by the respective urging mechanisms 10 into the convex spherical plate 2a.
Since the concave spherical plate 2b and the concave spherical plate 2b are pressed against each other, only the own weight of the upper surface plate 2 does not act on the test object A during pressing. Further, since the displacement of the test object A is measured by the vertical displacement measuring device 8 which comes into contact with the upper surface plate 2,
There is no occurrence of a measurement error of the displacement amount due to deformation of the members of the vertical moving mechanism 4 and the vertical load detector 6.

When the upper plate 2 is moved upward by the vertical moving mechanism 4, a tensile load is applied to the test object A, and the vertical load is detected by the vertical load detector 6, and the vertical load detector 6 detects the tensile load. Is measured by the vertical displacement measuring device 8. At this time, the air in the cylinder 10a of each urging mechanism 10 is exhausted as shown in FIG. 3, so that the piston 10b is directly engaged with one end of the cylinder 10a by its own weight of the upper surface plate 2, and the test object A tensile load is applied to A without the buffering action of each biasing mechanism 10.

In the compression test and the tensile test by the vertical moving mechanism 4, the lower surface plate 3 is moved in the horizontal direction by the horizontal moving mechanism 5 so that the test object A is subjected to the horizontal direction while a compressive load or a tensile load is applied. The horizontal load is detected by the horizontal load detector 7 and the horizontal displacement is measured by the horizontal displacement measuring device 9.
Is measured by

As described above, according to the characteristic test apparatus of the present embodiment, the upper plate 2 and the vertical movement mechanism 4
, Through the vertical load detector 6,
Since the load applied to the test object A is directly detected by the vertical load detector 6, the load is not affected by the weight of the upper surface plate 2 or the like or the sliding resistance of the vertical moving mechanism 4 at the time of measurement. The vertical load can always be measured accurately.

In the above-described embodiment, the characteristic test apparatus capable of applying a load in the vertical direction and the horizontal direction has been described. However, the present invention can be applied to a characteristic test apparatus only in the vertical direction.

[0024]

As described above, according to the characteristic test apparatus of the first aspect, since the measurement is not affected by the weight of the top plate or the like at the time of measurement, the vertical load can always be measured accurately. it can.

According to the characteristic test apparatus of the second aspect,
In addition to the effect of the first aspect, since the measurement error of the displacement amount due to the deformation of the members of the vertical movement mechanism and the vertical load detector does not occur, the displacement amount can always be accurately measured.

Further, according to the characteristic test apparatus of claim 3,
In addition to the effects of the first and second aspects, since only the own weight of the upper plate is not applied to the test object at the time of pressing, a measurement error in which the own weight of the upper plate becomes a dead load can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a front view of a characteristic test apparatus showing one embodiment of the present invention.

FIG. 2 is an enlarged side view of a main part of the characteristic test apparatus.

FIG. 3 is an enlarged side view of a main part of the characteristic test apparatus.

FIG. 4 is an explanatory diagram of an operation of the characteristic test apparatus.

FIG. 5 is an explanatory diagram of the operation of the characteristic test apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Frame, 2 ... Top plate, 3 ... Lower plate, 4 ... Vertical movement mechanism, 5 ... Horizontal movement mechanism, 6 ... Vertical load detector, 7 ... Horizontal load detector, 8 ... Vertical displacement measurement 9: Horizontal displacement measuring instrument, 10: Urging mechanism, A: Test object.

Claims (3)

[Claims] An upper plate for holding an upper surface of a test object, a lower plate for holding a lower surface of the test object, a vertical movement mechanism for vertically moving the upper plate, A vertical load detector for detecting a load in the vertical direction, wherein the upper surface plate and the vertical movement mechanism are provided so as to be supported by the apparatus main body via the vertical load detector. . 2. A vertical displacement detector for detecting a vertical displacement of the test object, wherein a detector of the vertical displacement detector is arranged to contact the upper surface plate. Item 4. The characteristic test device according to Item 1. 3. An urging mechanism is provided between the upper surface plate and the up-down movement mechanism so as to urge the upper plate side upward to slidably press against the up-down movement mechanism side. The characteristic test device according to claim 1.